Projectile and means to fire the same



Sept. 25, 1923. 1,468,822

E. LUDORF PROJECTILE AND MEANS TO FIRE THE SAME Filed Aug. 6. 1920Patented Sept. 25, 1923.

UNITED STATES PATENT OFFICE.

ERNST LUDORF, OF BERLIN-TREPTOW, GERMANY, ASSIGNOR TO THE FIRM PILUM A.G., O]? BERNE, SWITZERLAND.

YROJECTILE AND MEANS T0 FIRE THE SAME.

Application filed August 6, 1920. Serial No. 401,745.

T 0 all whom it may concem Be it known that I, ERNST LUDORF, a citi- Zenof the German Republic, of Berlin- Treptow. Defreggerstrasse No. 20,Germany, have invented new and useful Improvements in a Projectile andMeans to Fire the Same, of which the following is a specification.

The object of the present invention is to provide a projectile whichneeds less space and possesses less weight and which may be made at alower price as the cartridges, etc., known heretofor.

I attain the said object by forming the bullet integral with the shellcontaining the propelling charge. the cartridge case being dispensedwith.

With the above mentioned and other objects in view the inventionconsists in the novel construction and combination of parts hereinafterdescribed. illustrated in the accompanying drawings and pointed out inthe claim hereto appended; it being understood that various changes inthe form, proportion, size and minor details of construction within thescope of the claim may be resorted to without departing from the spiritor sacrificing any of the advantages of the invention.

To more fully comprehend the invention reference is directed to theaccompanying drawings wherein:

Fig. 1 is a longitudinal section through a projectile.

Fig. 2 shows in a diagrannnatical way electrical means for firing theprojectile Shown in Fig. 1.

Fig. 3 is a longitudinal section through a modified construction of theprojectile shown in Fig. 1.

Fig. 4 is an end view of the projectile shown in Fig. 3.

Fig. 5 is a section on line ab of Fig. 4.

Fig. 6 is a detail. partly in elevation and partly in section. of theelectrical firing means shown in Fig. 2.

The projectile shown in Fig. 1 comprises a jacket 1 having a head 2 anda core 3 Within said head 2. The inner wall of the jacket 1 is taperingand the thickness of the wall which is about equal to the thickness ofthe head at its fore end diminishes gradually toward the hind end of thejacket. At the hind end the jacket 1 is closed by a bot.- tom 6 made ofthin sheet metal with a low melting point. The bottom 6 is joined to thejacket 1 by means of a ring T of celluloid, or similar material which iseasily ignited. At the hind end the jacket 1 is provided with a collar 8which serves as a driving band. The propelling charge 9 is arrangedbetween the bottom (3 and the disk 5 arranged within the jacket.

The new projectile may be provided with a. percussion cap as shown in.Figs. 2, 3 and l and may be tired by means of a tiring pin as used inthe well known rifles. The projectile (Fig. 2) is provided with athree-armed bridge 26 in the centre of which the cap 28 is placed. Thearms 29 have triangular cross-section as shown in Fig. 4, the arms havean edge pointed to the interior of the jacket in such a. manner thatthey do not offer great resistance to the gases escaping from the jacket1 between the arms 29.

The bottom of the projectile may be made of paper or any other materialwhich is easily inflammable and the circuit may be closed in closeproximity to said bottom and by such means which when bearing currentare heated to stab degree that the said bot.- tom and therefrom thepropelling charge or a lighting charge is ignited.

That I wish to secure by Letters Patent is:

A cartridge comprising a head, ajacket integral with the head andprojecting rearardly therefrom. a core in the head. a disc in the jacketand bearing against the core, a propelling charge in the jacket and aclosure in the breech of the jacket, and a ring of material which has alow melting point, securing the closure in place.

In witness whereof I affix my signature.

ERNST LUDORF.

